tìm và sửa lỗi

At recess,the students practice to play basketball

=>At recess, the students practice playing basketball.

a) /x/ < 8

=>/x/ thuộc {0;1;2;3;4;5;6;7}

=>x thuộc {0;1;-1;2;-2;3;-3;4;-4;5;-5;6;-6;7;-7}

b)/x/ > 8 

=>/x/ thuộc {9;10;11;12;13....}

=> thuộc {9;-9;10;-10;11;-11 ;12;-12;13;-13.....}

c)/x/ <1

=>/x/ = 0 

=>x=0

Chia động từ thích hợp:

1.Duy didn't visit the museum with his class Sunday because he caught a cold.

2. How much does it cost to mail a letter to England?

3. Take these pills and you will feel better then, Ha.